Commit Graph

14 Commits

Author SHA1 Message Date
Jake Burkholder
e7dc92f0f9 Bump TSB_PAGES_SHIFT to 4. Less sucks too much. 2002-06-04 19:40:45 +00:00
Jake Burkholder
1982efc5c2 Merge the code in pv.c into pmap.c directly. Place all page mappings onto
the pv lists in the vm_page, even unmanaged kernel mappings.  This is so
that the virtual cachability of these mappings can be tracked when a page
is mapped to more than one virtual address.  All virtually cachable
mappings of a physical page must have the same virtual colour, or illegal
alises can be created in the data cache.  This is a bit tricky because we
still have to recognize managed and unmanaged mappings, even though they
are all on the pv lists.
2002-05-29 06:08:45 +00:00
Jake Burkholder
2dbb68a495 Update tsb_tte_enter prototype per tsb.c rev 1.20. 2002-05-21 02:15:37 +00:00
Jake Burkholder
df38f87be1 Minimal testing has shown that a 4 page tsb is a nice sweet spot for current
work loads.  It tapers off after that as gcc's working set generally just fits.

compiling bin/csh:

TSB_PAGES = 2
	213.33 real        77.59 user       110.01 sys
TSB_PAGES = 4
	116.43 real        75.78 user        19.16 sys
TSB_PAGES = 8
	119.27 real        76.38 user        18.12 sys

Testing by:	tmm
2002-02-27 06:18:02 +00:00
Jake Burkholder
d689965cb4 Wrap long lines. 2002-02-27 00:28:35 +00:00
Jake Burkholder
6e5f3d0f0f Allow the user tsb to span multiple pages. Make the default 2 pages for now
until we do some testing to see what's best.  This gives a massive reduction
in system time for processes with a relatively large working set.  The size
of the tsb directly affects the rss size that a user process can keep mapped.
When it starts to get full replacements occur and the process takes a lot of
soft vm faults.  Increasing the default from 1 page to 2 gives the following
before and after numbers for compiling vfs_bio.c:

before:
       14.27 real         6.56 user         5.69 sys
after:
        8.57 real         6.11 user         1.62 sys

This should make self hosted builds more tolerable.
2002-02-26 02:37:43 +00:00
Jake Burkholder
919f71f0fc Adapt the tsb_foreach interface to take a source and a destination pmap so
that it can be used for pmap_copy.  Other consumers ignore the second pmap.
Add statistics gathering for tsb_foreach.
Implement pmap_copy.
2002-02-23 20:25:20 +00:00
Thomas Moestl
62ec4add59 1. Implement an optimization for pmap_remove() and pmap_protect(): if a
substantial fraction of the number of entries of tte's in the tsb
   would need to be looked up, traverse the tsb instead. This is crucial
   in some places, e.g. when swapping out a process, where a certain
   pmap_remove() call would take very long time to complete without this.
2. Implement pmap_qenter_flags(), which will become used later
3. Reactivate the instruction cache flush done when mapping as executable.
   This is required e.g. when executing files via NFS, but is known to
   cause problems on UltraSPARC-IIe CPU's. If you have such a CPU, you
   will need to comment this call out for now.

Submitted by:	jake (3)
2002-01-02 18:49:20 +00:00
Jake Burkholder
624eb79821 Remove support for multi level tsbs, making this code much simpler and
much less magic, fragile, broken.  Use ttes rather than sttes.
We still use the replacement scheme used by the original code, which
is pretty cool.

Many crucial bug fixes from:	tmm
2001-12-29 08:15:43 +00:00
Jake Burkholder
6ef2d9a02d Parameterize the size of the kernel virtual address space on KVA_PAGES.
Don't use a hard coded address constant for the virtual address of the
kernel tsb.  Allocate kernel virtual address space for the kernel tsb
at runtime.
Remove unused parameter to pmap_bootstrap.
Adapt pmap.c to use KVA_PAGES.
Map the message buffer too.
Add some traces.
Implement pmap_protect.
2001-10-20 16:17:04 +00:00
Jake Burkholder
956856ae06 Move the kernel to end of the first 4 gigabytes of address space, so that
one 4 meg page can map both the kernel and the openfirmware mappings.
Add the openfirmware mappings to the kernel tsb so we can call the firmware
on the kernel trap table and access kernel memory normally.
Implement pmap_swapout_proc, pmap_swapin_proc, pmap_swapout_thread,
pmap_swapin_thread, pmap_activate, pmap_page_exists, and pmap_phys_address.
2001-09-30 19:03:22 +00:00
Jake Burkholder
3af9da91bc Fix macros for setting and extracting the context field in ttes and
add macros for the fields in sfsr.
2001-08-06 02:20:36 +00:00
Jake Burkholder
d741ca6bdb Fix a bug translating virtual translation table entry addresses to physical
addresses.  It helps to use the physical address that the virtual address
actually maps to (doh!).  Comment out some code that crashes.

Found independently by:	tmm
2001-08-03 01:21:24 +00:00
Jake Burkholder
89bf8575ee Flesh out the sparc64 port considerably. This contains:
- mostly complete kernel pmap support, and tested but currently turned
  off userland pmap support
- low level assembly language trap, context switching and support code
- fully implemented atomic.h and supporting cpufunc.h
- some support for kernel debugging with ddb
- various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00